Plate 7 in Davis (1927) illustrates the varying character of the cardiac jelly. Figure 36 (left) shows a frontal section through section 1-3-9 of embryo 3709.
		On the right is section 1-3-9 (section 30) from the DREM database. The region illustrated in figure 36 of Davis is outlined in red.
		Below, is a higher magnification view of part of section 1-3-9